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Headshot of Katherine Mercy, FAAD, FACMS, MD, board-certified dermatologist at Forefront Dermatology

Katherine Mercy, MD, FAAD, FACMS

Board-Certified Dermatologist Board-Certified Mohs Surgeon Fellowship-Trained Mohs Surgeon
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Dr. Katherine Mercy is a Fellowship-Trained Mohs surgeon and Board-Certified Dermatologist.  She earned her doctorate in medicine from Georgetown University and went on to Northwestern / McGaw Medical Center, Children’s Memorial Hospital for dermatology and pediatric residencies where she was Chief Resident. As a physician, Dr. Mercy finds it essential to empower patients by providing them with an understanding of their diagnosis and of the available treatment options.

Dr. Mercy specializes in Mohs micrographic surgery, a specialized, highly effective technique used to track and remove cancerous roots. The goal of Mohs surgery is to remove as much of the skin cancer as possible while doing minimal damage to surrounding healthy tissue. It is recognized as the skin cancer treatment with the highest cure rate – up to 99%, as compared to a cure rate of 85% to 92% for standard skin cancer surgery.

She is thrilled to return to the western suburbs of Chicago, where she grew up, to provide this specialized service to this community.

Undergraduate Degree
University of Notre Dame, Notre Dame, IN

Medical School
Georgetown University School of Medicine, Washington, DC

Pediatrics Residency
Northwestern / McGaw Medical Center, Children’s Memorial Hospital, Chicago, IL

Dermatology Residency
Northwestern / McGaw Medical Center, Children’s Memorial Hospital, Chicago, IL

Micrographic Surgery and Dermatologic Oncology Fellowship
University of Iowa Hospitals and Clinics, Iowa City, IA

Schedule an appointment with Dr. Mercy at these locations:

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Forefront Dermatology

3253 S Harlem Ave Ste 1A
Berwyn, IL 60402

(708) 788-3885

Medical dermatology

Cosmetic dermatology

Skin cancer treatment

Premier Dermatology clinic exterior in Crest Hill, IL
Premier Dermatology

A Forefront Dermatology Practice

2051 Plainfield Rd
Crest Hill, IL 60403

(815) 741-4343

Medical dermatology

Skin cancer treatment

Cosmetic dermatology

Plastic surgery

Premier Dermatology clinic exterior in Naperville, IL
Premier Dermatology

A Forefront Dermatology Practice

1520 Bond St
Naperville, IL 60563

(630) 357-7536

Medical dermatology

Skin cancer treatment

Cosmetic dermatology

Plastic surgery

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What Dr. Mercy's patients have to say:

Google Reviews • Forefront

No waiting, told me what she was doing as she was working on my ear. Answered all my questions.

Google Reviews • Forefront

Dr Mercy was wonderful. She and her assistant took time to discuss my procedure and all details for my concern. They explained all after concerns and medical issues. Dr Mercy is a very skilled surgeon and proceeded with the procedure with minimal pain or after side effects. I highly recommend her and her assistance and I am a medical professional .with many years of experience. Thank you for a fantastic doctor- patient experience.

Google Reviews • Forefront

Compassionate, caring and professional.

Google Reviews • Forefront

Had an absolute fabulous experience. Great service.

Google Reviews • Forefront

Dr.Mercy explained the entire procedure and what to expect afterwards. I was told how to care for the surgery on my nose. There was no pain. I’m very happy overall

Google Reviews • Forefront

Everything went well and and doctor and nurse and staff were kind and informative

Google Reviews • Forefront

Went in for a follow up visit and everything is going good. Doctor Mercy was so good in explaining my recovery. She is so easy to talk with that it’s not a stressful visit at all. Her assistant is very good at her job as well. Thank you

Google Reviews • Forefront

Very professional and friendly. I wont hesitate to return for my annual exam.

Google Reviews • Forefront

Dr Mercy is truly great. I’ve had her for Moh’s surgery 3-4 times now. Explains everything on what to expect on the procedure. Always look forward to seeing her and having her perform the the procedure. Outstanding doctor!

Google Reviews • Forefront

Very professional get me well informed of what was going on did an excellent job

Google Reviews • Forefront

Dr. Mercy was very compassionate and did a great job. Very good experience

Google Reviews • Forefront

Dr. Mercy and the whole staff were wonderful. They explained in great detail what the procedure would be like. She made me feel relaxed and I had total confidence in her. Couldn’t have asked for a better experience.

Google Reviews • Forefront

Had an excellent Mohs surgical experience with Dr. Mercy last week! Exceptional, professional bed side manner in explaining the entire situation and process. Dr. Mercy was/is an excellent communicator before, during and after the surgery. Mr. Merced followed up with a phone call several days later to inquire about my post surgical health. Thank-you, Dr. Mercy! …LB

Google Reviews • Forefront

Hi, Dr Mercy was amazing. I was very nervous about my procedure, but she was very kind and took the time to put me at ease. She was though in her work, and was able to take care of the issue, quickly and with as little of pain as she could. I would definitely recommend her.

Google Reviews • Forefront

Everyone was kind, professional and knowledgeable. My husband was so worried about this but the staff quickly put him at ease. I would recommend Dr. Mercy one hundred percent. Thanks to everyone for making a stressful situation into a positive experience.

Google Reviews • Forefront

Every thing was wonderful so professional and knowledgeable. Thank you for your kindness and support in this stressful situation.

Google Reviews • Forefront

Professionalism, kindness and excellent care best describes my experience. Thanks to all!!

Google Reviews • Forefront

Dr.Mercy is the best! Very down to earth,makes you feel at ease ,I highly recommend her to anyone!!

Google Reviews • Forefront

Dr Mercy is phenomenal! She is kind, patient, knowledgeable, professional and honest!

Google Reviews • Forefront

GREAT JOB! TERRY PEEPLES